org.quartz.impl.jdbcjobstore
Class SimpleSemaphore

java.lang.Object
  |
  +--org.quartz.impl.jdbcjobstore.SimpleSemaphore

All Implemented Interfaces:

Semaphore

public class SimpleSemaphore

extends java.lang.Object

implements Semaphore

An interface for providing thread/resource locking in order to protect resources from being altered by multiple threads at the same time.

Author:

jhouse

Constructor Summary

SimpleSemaphore()

Method Summary

void	init(java.sql.Connection conn, java.util.List listOfLocks)
boolean	isLockOwner(java.sql.Connection conn, java.lang.String lockName) Determine whether the calling thread owns a lock on the identified resource.
boolean	obtainLock(java.sql.Connection conn, java.lang.String lockName) Grants a lock on the identified resource to the calling thread (blocking until it is available).
void	releaseLock(java.sql.Connection conn, java.lang.String lockName) Release the lock on the identified resource if it is held by the calling thread.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleSemaphore

public SimpleSemaphore()

Method Detail

obtainLock

public boolean obtainLock(java.sql.Connection conn,
                          java.lang.String lockName)

Grants a lock on the identified resource to the calling thread (blocking until it is available).

Specified by:

obtainLock in interface Semaphore

Returns:

true if the lock was obtained.

releaseLock

public void releaseLock(java.sql.Connection conn,
                        java.lang.String lockName)

Release the lock on the identified resource if it is held by the calling thread.

Specified by:

releaseLock in interface Semaphore

isLockOwner

public boolean isLockOwner(java.sql.Connection conn,
                           java.lang.String lockName)

Determine whether the calling thread owns a lock on the identified resource.

Specified by:

isLockOwner in interface Semaphore

init

public void init(java.sql.Connection conn,
                 java.util.List listOfLocks)